Fountain pen



H. BARON FOUNTAIN PEN Herman Baron INVENTQR ATTORNEY$ Filed June 25,1937 Patented Aug. 16, 1933 UNETE STTES PTELNT QFFHQE 4 Claims.

The invention relates to a writing pen and more especially to a fountainpen.

The primary object of the invention is the provision of a pen of thischaracter, wherein the bar- 5 rel is fitted with a novel form of pump soas to enable the quick'and convenient filling of the pen with ink andsuch pump is a built-in unit of the pen.

Another object of the invention is the provision of a pen of thischaracter, wherein the pump unit includes an extensible one stroke stemwhich on the retracting of the same will be confined or concealed withinthe barrel of the pen and is readily accessible for the operation of theunit to fill the pen with ink by a single stroke action.

A further object of the invention is the provision of a pen of thischaracter, which is simple in its construction, thoroughly reliable andef- -:fective in operation, susceptible of filling with ink through asingle stroke action in the operation of the pump unit, durable, andinexpensive to manufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which discloses the preferred embodiment of the invention andpointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation of a pen partly in section constructed inaccordance with the invention.

Figure 2 is a fragmentary vertical longitudinal sectional View showingthe stem of the pumping unit extended.

Figure 3 is a view similar to Figure 2 showing the pumping unit inposition for the filling of 4.0 the barrel of the pen.

Figure 4 is an exploded perspective View of the extensible stern partsdisassembled.

Figure 5 is a sectional view on the line 5-5 of "Figure 1 looking in thedirection of the arrows.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail, the pen constituting the presentinvention comprises a barrel ill tapered outwardly at one end at l l andhaving in this end a pen point l2 in association with an ink feeder (notshown). The barrel iii provides an ink chamber l3 interiorly thereof andthe opposite end of this barrel is normally open and internally threadedat M for removably accommodating a sleeve-like plug 55 carrying a guidecylinder IS, the latter being fixedly held in a center opening llprovided in said sleeve-like plug 85. This cylinder it constitutes ahousing for a purpose presently described.

Accommodated Within the cylinder iii are the inner and outertelescopically fitted stem sections 58 and I9, respectively. The sectionI9 slidably telescopes over the section it and is pro vided with abayonet slot 2!! longitudinally disposed therein for accommodating alatching lug 2| on the section i8. Thus the section [9 can be extendedon the section i8 and both sections [8 and i9 latched in the extendedrelation thereof. 7 Q

The plug I5 is formed with a reduced inner end 22 which is accommodatedwithin the open end of an expansible resilient bag 23. This bag fittedover the reduced end 22 is made fast and sealed concentrically aboutsaid reduced end by a clamping ring 24. The section N3 of the stem isslidable through a guide opening 25 centrally in the inner end 26 of thecylinder l6 and this section has separably connected thereto at itsinnermost end a half spherical head 2'! which is accommodated within thebag '33 at its inner closed rounded end 28 to avoid damage thereto underexpansion of said bag. The section l9 snugly fits within the cylinder l6and when latched with the section is after extension of the section l9thereon through a single stroke of the stem for expansion of the bag 23the barrel ll) of the pen will be filled with ink in that thecontracting of the said bag within the barrel iii effects suction of inkthrough the feeder end II for the filling of the ink chamber [3 withinsaid barrel. The section H1 at its outer end has fitted therewith acombined cap and hand knob 29 which enables manual manipulation of thestem for single stroke operation thereof and for the extending of thesection it of said stem as well as the confinement of this section i9within the cylinder It. When the section 59 is confined within thecylinder l6 and the section it has be- 4 latches the cylinder in theextended position with relation to the section I8 of the stem. Byforcing these latched sections l8 and IS with each other inwardly of thecylinder I6, the bag 23 will be expanded and when the latter contractsthrough inherent elasticity or resiliency a suction will be set up inthe chamber I3 so that ink can be drawn into the barrel H] for thefilling of the pen. Thereafter the section I8 of the stem will havemoved into the cylinder l6 and it is required that the operator or userpushes the section [9 into the cylinder l6 for confinement therein withthe cap 29 closing the end IA of the barrel Ill of the pen. The pen isnow filled with ink and ready for use in the usual well-known manner.

What is claimed is:

1. In a pen of the character described, a barrel forming an ink chamber,a plug firmly but removably supported in an opening formed in saidbarrel, an extensible stem slidably fitting in an opening formed in theplug, a substantially stationary cylinder carried by and substantiallyfixedly mounted on the plug interiorly of the barrel and adapted toaccommodate the extensible stem when in contracted condition, and aninherently elastic bag interiorly of the barrel, substantially fixedlyconnected to the plug and expanded by the said stem when extended andactuated.

2. In a pen of the character described, a barrel forming an ink chamber,a plug firmly but removably supported in an opening formed in saidbarrel, an extensible stem slidably fitting in an opening formed in theplug, a substantially stationary cylinder carried by and substantiallyfixedly mounted on the plug interiorly of the barrel and adapted toaccommodate the extensible stem when contracted therein, an inherentlyelastic bag interiorly of the barrel, substantially fixedly connected tothe plug and expanded by the said stem when extended and actuated, andmeans for latching the stem extended.

3. In a pen of the character described, a barrel forming an ink chamber,a plug firmly but removably supported in an opening formed in saidbarrel, an extensible stem slidably fitting in an opening formed in theplug, a substantially stationary cylinder carried by the plug interiorlyof the barrel and adapted to accommodate the extensible stem whencontracted therein, an inherently elastic bag interiorly of the barrel,substantially fixedly connected to the plug and expanded by the saidstem when extended and actuated, means for latching the stem extended,and a cap carried at the outer end of the extensible stem for thebarrel.

4. In a fountain pen of the type described the combination including afluid reservoir, means for at least assisting in the filling of saidreservoir comprising a substantially cylindrical plug, firmly butremovably seated in an opening formed in said reservoir, and having asubstantially coaxial opening formed therein; an essentially cylindricalhollow sheath-like guide member relatively fixedly mounted on said plugpositioned coaxial said opening formed therein; a composite extensibleplunger member positioned within said guide comprising a plurality ofconcentric telescoping tubes adapted to be engaged with each other whenin extended position, a substantially hemispherical head carried on andfixedly secured to the end portion of said plunger normally positionedWithin said reservoir, said head being adapted to rest upon the end ofsaid guide member furthest from said plug; and a substantiallycylindrical sac, elastic and extensible along the axis thereof, closedat one end, enveloping said head and guide member and fixedly secured atthe open thereof to said plug.

HERMAN BARON.

